28035canboot/flash_programming/source/DSP2803x_ECap.c

//###########################################################################
//
// FILE:   DSP2803x_ECap.c
//
// TITLE:  DSP2803x eCAP Initialization & Support Functions.
//
//###########################################################################
// $TI Release: F2803x C/C++ Header Files and Peripheral Examples V130 $
// $Release Date: May  8, 2015 $
// $Copyright: Copyright (C) 2009-2015 Texas Instruments Incorporated -
//             http://www.ti.com/ ALL RIGHTS RESERVED $
//###########################################################################

#include "DSP2803x_Device.h"     // DSP2803x Headerfile Include File
#include "DSP2803x_Examples.h"   // DSP2803x Examples Include File

//---------------------------------------------------------------------------
// InitECap:
//---------------------------------------------------------------------------
// This function initializes the eCAP(s) to a known state.
//
void InitECap(void)
{
   // Initialize eCAP1

   //tbd...

}

//---------------------------------------------------------------------------
// Example: InitECapGpio:
//---------------------------------------------------------------------------
// This function initializes GPIO pins to function as ECAP pins
//
// Each GPIO pin can be configured as a GPIO pin or up to 3 different
// peripheral functional pins. By default all pins come up as GPIO
// inputs after reset.
//
// Caution:
// For each eCAP peripheral
// Only one GPIO pin should be enabled for ECAP operation.
// Comment out other unwanted lines.

void InitECapGpio()
{

   InitECap1Gpio();
}

void InitECap1Gpio(void)
{
   EALLOW;
/* Enable internal pull-up for the selected pins */
// Pull-ups can be enabled or disabled by the user.
// This will enable the pullups for the specified pins.
// Comment out other unwanted lines.

// GpioCtrlRegs.GPAPUD.bit.GPIO5 = 0;      // Enable pull-up on GPIO5 (CAP1)
 //  GpioCtrlRegs.GPAPUD.bit.GPIO19 = 0;     // Enable pull-up on GPIO19 (CAP1)
 GpioCtrlRegs.GPAPUD.bit.GPIO24 = 0;     // Enable pull-up on GPIO24 (CAP1)

// Inputs are synchronized to SYSCLKOUT by default.
// Comment out other unwanted lines.

// GpioCtrlRegs.GPAQSEL1.bit.GPIO5 = 0;    // Synch to SYSCLKOUT GPIO5 (CAP1)
 //  GpioCtrlRegs.GPAQSEL2.bit.GPIO19 = 0;   // Synch to SYSCLKOUT GPIO19 (CAP1)
 GpioCtrlRegs.GPAQSEL2.bit.GPIO24 = 0;   // Synch to SYSCLKOUT GPIO24 (CAP1)
/* Configure eCAP-1 pins using GPIO regs*/
// This specifies which of the possible GPIO pins will be eCAP1 functional pins.
// Comment out other unwanted lines.

// GpioCtrlRegs.GPAMUX1.bit.GPIO5 = 3;     // Configure GPIO5 as CAP1
 //  GpioCtrlRegs.GPAMUX2.bit.GPIO19 = 3;    // Configure GPIO19 as CAP1
 GpioCtrlRegs.GPAMUX2.bit.GPIO24 = 1;    // Configure GPIO24 as CAP1

    EDIS;
}

//===========================================================================
// End of file.
//===========================================================================